<template>
    <div>
        <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
</el-breadcrumb>

<!-- 卡片视图 -->
<el-card>
    <!-- 添加角色按钮区域 -->
   <el-row>
    <el-col>
        <el-button type="primary">添加角色</el-button>
    </el-col>
   </el-row>

   <!-- 角色列表区域 -->
   <el-table :data="rolelist" border stripe>
    <!-- 展开列 -->
    <el-table-column type="expand">
        <template slot-scope="scope">
            <el-row :class="['bdbottom',i1 ===0?'bdtop':'','vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
                <!-- 渲染一级权限 -->
                <el-col :span="5">
                    <el-tag closable @close="removeRightById(scope.row,
                    item1.id)">{{item1.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                </el-col>
                <!-- 渲染二级三级 -->
                <el-col :span="19">
                    <!-- for循环 -->
                <el-row :class="[i2===0 ? '':'bdtop','vcenter']" v-for="(item2,i2)
                 in item1.children" :key="item2.id">
                    <el-col :span="6">
                        <el-tag type="success" 
                        closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                    </el-col>
                    <el-col :span="18">
                    <el-tag type="warning" v-for="(item3,i3) in item2.children"
                    :key="item3.id" 
                    closable @close="removeRightById(scope.row,item3.id)">
                    {{item3.authName}}</el-tag>
                    </el-col>
                </el-row>
                </el-col>
            </el-row>


            <!-- <pre>
            {{scope.row}}
            </pre> -->
        </template>
    </el-table-column>
    <!-- 索隐裂 -->
    <el-table-column type="index"></el-table-column>
    <el-table-column label="角色名称" prop="roleName">
    </el-table-column>
    <el-table-column label="角色描述" prop="roleDesc">
    </el-table-column>
    <el-table-column label="操作" width="300px">
        <template slot-scope="scope">
            <el-button size="mini" type="primary" 
            icon="el-icon-search">编辑</el-button>
            <el-button size="mini" type="danger" 
            icon="el-icon-delete">删除</el-button>
            <el-button size="mini" type="warning" 
            icon="el-icon-setting" @click="showSetRightDialog
            (scope.row)">分配权限</el-button>
        </template>
    </el-table-column>
   </el-table>
</el-card>

<!-- 分配权限对话框 -->
<el-dialog
  title="分配权限"
  :visible.sync="showSetRightDialogVisible"
  width="50%"
  @close="setRightDialogClosed">
  <!-- 树形控件 -->
  <el-tree :data="rightslist" :props="treeProps"  show-checkbox
  node-key="id" default-expand-all
  :default-checked-keys="defKeys" ref="treeRef"></el-tree>
  <span slot="footer" class="dialog-footer">
    <el-button @click="showSetRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" 
    @click="allotRights">确 定</el-button>
  </span>
</el-dialog>

    </div>
</template>

<script>
    export default{
        data(){
            return{
                rolelist:[],
                showSetRightDialogVisible:false,
                rightslist:[],
                treeProps:{
                    label:'authName',
                    children:'children'
                },
                defKeys:[],
                roleId:''
            }
        },
        created(){
            this.getRolesList()
        },
        methods:{
            async getRolesList(){
                const {data:res} = await this.$http.get('roles')

                if(res.meta.status!==200){
                    return this.$message.error('获取角色列表失败!')
                }

                this.rolelist = res.data
                console.log(this.rolelist);
            },
            async removeRightById(role,rightId)
            {
                //弹框提示是否删除
               const confirmResult = await 
               this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
                }).catch(err =>err)

                if(confirmResult !== 'confirm'){
                    return this.$message.info('取消了删除！')
                }
                
              const{data:res} = await this.$http.delete
               (`roles/${role.id}/rights/${rightId}`)

               if(res.meta.status!==200){
                return this.$message.error('删除权限失败!')
               }

            //    this.getRolesList()
            role.children = res.data
            },
           async showSetRightDialog(role){
            this.roleId = role.id
                //获取所有权限路径
               const {data:res} = await this.$http.get('rights/tree')

               if(res.meta.status!==200){
                return this.$message.error('获取权限数据失败！')
               }
               //把获取到的权限数据保存到data中
               this.rightslist = res.data
               console.log(this.rightslist);
               //递归获取三级节点的Id
               this.getLeafKeys(role,
               this.defKeys)

                this.showSetRightDialogVisible = true
            },
            //通过递归的形式，获取所有三级权限的id，
            // 并保存到defkeys中
            getLeafKeys(node,arr){
                if(!node.children){
                    return arr.push(node.id)
                }

                node.children.forEach(item=>
                this.getLeafKeys(item,arr))
            },
            //监听分配权限对话框关闭事件
            setRightDialogClosed(){
                this.defKeys = []
            },
            //点击为角色分配权限
            async allotRights(){
                const keys = [
                    ...this.$refs.treeRef.
                    getCheckedKeys(),
                    ...this.$refs.treeRef.
                    getHalfCheckedKeys()
                ]
                const idStr = keys.join(',')
              const{data:res}=  await this.$http.post
              (`roles/${this.roleId}/rights`,
                {rids:idStr})

                 if(res.meta.status!==200){
                    return this.$message.error('分配权限失败!')
                }

                this.$message.success('分配权限成功！')
                this.getRolesList()
                this.setRightDialogVisible = false

               
            }
        }
    }
</script>

<style lang="less" scoped>
.el-tag{
    margin: 7px;
}
.bdtop{
    border-top:1px solid #eee;
}
.bdbottom{
    border-bottom: 1px solid #eee;
}
.vcenter{
    display: flex;
    align-items: center;
}
</style>